South Korea refractories market is segmented by product type (shaped, unshaped, insulating, and functional refractories), refractory chemistry or mineral (magnesia, alumina, silica, doloma, zirconia, chromite, silicon carbide, and carbon), alkalinity (basic, acidic, and neutral), end-user industry (iron and steel, cement and lime, aluminium, glass, energy, and foundry), and specific iron and steel applications (ironmaking, primary steelmaking, secondary steelmaking, continuous casting, and downstream processing).

South Korea is one of the world’s largest importers of finished refractories and one of Asia’s most steel-centred refractory markets. A small domestic supply base built around the POSCO group, Chosun Refractories and Korea Refractories serves two integrated steelmakers, POSCO and Hyundai Steel, whose volumes are flat and whose furnaces are beginning to change. Refractories are the bricks, castables, gunning and ramming mixes, insulating products and flow-control parts that keep furnaces, ladles, kilns and reactors intact above 1,200°C. They are consumed, not owned, so spend follows heats, campaigns and relines, and only secondarily how many plants exist. No official body publishes an audited Korean refractories market value, and Market Decipher does not put a single figure on 2026 consumption, because any estimate would swing on how captive supply, installation work and furnace maintenance are counted. The supply-side and trade anchors are firmer. Chosun Refractories reported revenue of KRW 558.7 billion in 2023 and about KRW 532 billion on a trailing basis in mid-2026, Korea Refractories booked KRW 193.6 billion of refractory sales in 2023, and POSCO Future M supplies a captive refractory and furnace-maintenance business inside the POSCO group. On trade, South Korea imported USD 245 million of refractory bricks, the fourth-largest total in the world, against exports of USD 28 million. Adding other refractory ceramics (HS 6903), imports were USD 372 million against exports of about USD 75 million, a ratio of roughly five to one.
Demand rests on a steel industry that has stopped shrinking but has not grown. Crude steel output fell 2.2% to 62.2 million tonnes in 2025, about a 15-year low and 14.2% below the 2018 peak of 72.5 million tonnes, while domestic steel consumption fell to 43.6 million tonnes, a 23-year low and about 22% below 2021. 2026 is a modest recovery: January–August output was 42.81 million tonnes, which annualises to about 64.2 million tonnes. The mix matters more than the total. Blast-furnace producers POSCO and Hyundai Steel made 31.01 million tonnes, essentially unchanged on the year and about 72% of the total, while electric-furnace producers made 11.8 million tonnes, some 600,000 tonnes more. Market Decipher reads this as a recovery led by the part of the industry that buys refractories as a consumable, not by the part that buys large, lumpy relining packages, and it leaves the integrated mills, which are the highest-value customers, flat.
Three structural forces matter more than the cycle. Buyer power is concentrated and partly vertical, because POSCO tenders annual supply contracts while its own group company, POSCO Future M, supplies refractories and maintains furnaces. Sourcing runs through China, which supplied about 79% of imported bricks in 2022, and domestic makers outsource part of their production and raw-material sourcing to the Chinese magnesia region around Dashiqiao. And the furnace base is starting to change: POSCO began operating a 2.5-million-tonne electric arc furnace at Gwangyang in June 2026, its HyREX direct-reduction plant is scheduled for early 2028, and Hyundai Steel is building a direct-reduction pilot at Dangjin. The sourcing, product and customer-qualification choices made over the next two to three years will set competitive positions for most of the forecast period.
Demand Catalysts Through 2036
A volume floor under integrated steel. South Korea’s output has stopped falling, and the World Steel Association projects domestic demand growth of 1.8% in 2026 and 1.3% in 2027. That is not a boom, but linings are finite and a floor in heats means a floor in replacement demand. Market Decipher expects consumption to stabilise at current levels through 2027, with growth coming from mix and price rather than tonnage.
A hybrid electric furnace entering its ramp-up. POSCO’s Gwangyang electric arc furnace began operating in June 2026 with 2.5 million tonnes of annual capacity. It will initially blend hot metal from blast furnaces with electric-furnace melt and later move into high-grade steels such as automotive sheet and electrical steel, with product testing under way and utilisation expected to ramp up from 2027. A new furnace needs first-fill linings and a qualified slag-line and ladle package, and the supplier specified for the first fill usually keeps the maintenance campaigns that follow. Because the furnace runs alongside blast furnaces rather than replacing them, Market Decipher expects it to add demand for electric-furnace products without immediately removing integrated-mill demand.
Direct reduction as a new lining category. POSCO’s HyREX plant is scheduled to be commissioned in early 2028, and Hyundai Steel is building a direct-reduction pilot at Dangjin, where a hydrogen plant has run since 2016, to fix the technology and standards for its Louisiana mill. Shafts and melters use different chemistries from blast furnaces, mostly alumina-based and carbon-bonded systems. The pilot and the Louisiana project give Korean suppliers a place to qualify products before any large domestic order exists.
Recurring contract demand from the integrated mills. POSCO’s annual refractory supply contracts show the scale of the consumable base. Chosun Refractories signed a KRW 74.7 billion supply contract with POSCO for October 2025 to September 2026, equal to 14.91% of its latest revenue, covering supply to Gwangyang and Pohang, alongside a separate contract of KRW 41.6 billion for 43 ladle castable items. Contracts of this kind are renewed each year, so the revenue is stable but the price is reset every autumn.
Follow-the-customer overseas demand. POSCO Future M supplies refractories and performs construction and repair work through overseas affiliates, including Zhangjiagang Pohang Refractories in China, to serve Pohang Stainless Steel’s site there, and a unit in Indonesia to supply PT Krakatau POSCO, with Chosun Refractories as a partner in the offshore ventures. Hyundai Steel’s Louisiana mill adds a US site. Market Decipher expects this customer-led export model to carry more of the growth than customs-recorded brick exports.
Friction Points and Disruptions
A domestic steel base in stagnation. Output is 14.2% below the 2018 peak and domestic consumption is at a 23-year low, held back by the construction downturn. The top three producers ran at an average operating rate of 79.8% in 2024, and Hyundai Steel temporarily shut its Pohang No. 2 plant in June 2025 after a prolonged demand decline. Fewer heats lengthen lining campaigns, and when mills defer relines suppliers lose the lumpy, high-value events that carry their margins.
Price pressure inside the group and the tender. POSCO Future M reported that refractory and plant sales fell in the third quarter of 2026 on lower refractory prices and reduced volumes, although profit improved because one-off costs did not recur. Independent suppliers face the same annual price reset without the captive volume. Chosun Refractories shows the squeeze: trailing earnings of about KRW 2.2 billion on revenue of KRW 532 billion leave almost no margin for new product investment.
Import dependence on China. China supplied USD 193 million of the USD 245 million of bricks imported in 2022, about 79%, followed by Japan (USD 13 million), France (USD 8.8 million), the United States (USD 7.6 million) and India (USD 6.2 million). In refractory ceramics China supplied USD 64.6 million of USD 127 million, about 51%. Market Decipher reads the brick figure as both a price floor and a supply-chain exposure, and the second is the larger risk if Chinese magnesia policy tightens.
Outsourcing that blurs the domestic supply base. POSCO Future M’s Yingkou branch of its Chinese affiliate inspects and manages the quality of outsourced refractories and raw materials in Dashiqiao, with Chosun Refractories as a partner. The Korean brand therefore covers a supply chain that is partly Chinese, which limits the margin domestic producers can claim and ties their cost to Chinese conditions.
Customer concentration. Two integrated producers account for about 72% of steel output, and one of them owns a refractory company. Chosun Refractories alone has a single contract with POSCO worth about 15% of revenue. A change in qualification, a captive-supply decision or a delayed furnace project at one customer moves a supplier’s results.
Furnace transitions that are phased, not sudden. The Gwangyang electric furnace is a hybrid that still uses blast-furnace hot metal, HyREX is not due until 2028, and Hyundai’s direct-reduction work is at pilot scale. Suppliers must invest in alumina, carbon-bonded and high-wear monolithic capability before the volumes arrive, in a market where the integrated customers are cutting costs.
Eight Shifts Redefining Value in South Korean Refractories
We read the evidence as eight shifts. Each ends with the commercial consequence we draw from it.
From blast furnace to hybrid electric and direct reduction. Blast-furnace makers still produce about 72% of Korean steel, but POSCO’s Gwangyang electric furnace started in June 2026, HyREX follows in 2028 and Hyundai Steel is piloting direct reduction at Dangjin. Consequence: alumina-based and carbon-bonded systems, high-wear monolithics and melter linings gain weight against traditional basic bricks, and suppliers whose Korean business is mainly magnesia-carbon for converters need a second portfolio.
Volume has stabilised, price has not. Output is recovering to about 64.2 million tonnes, but integrated-mill volume is flat and POSCO Future M reports lower refractory prices. Consequence: profit in Korea is made in contract structure and mix, and a supplier chasing tonnage in an annual-tender market is mispricing its own risk.
The customer owns a supplier. POSCO Future M is a POSCO group company that supplies shaped and unshaped refractories and maintains furnaces, while POSCO also tenders annual contracts to independents such as Chosun Refractories. Consequence: independents compete for the share the captive supplier does not take, and they must win it on specification, service and cost.
China sets the price floor and the supply chain. Chinese bricks are about 79% of imports, and Korean producers work with Chinese partners in Dashiqiao for outsourced refractories and raw materials. Consequence: domestic margin is whatever specification, service and speed can add to a Chinese cost base, and a standing landed-cost and sourcing model should be reviewed quarterly.
Specialty parts come from outside China. In refractory ceramics China is only about 51% of imports, with the United States at about 18% (USD 22.9 million), Japan at about 15% (USD 18.5 million) and Germany at about 6% (USD 8 million). Consequence: flow-control and engineered parts are bought on specification, not on price, and they are the most defensible import-substitution opportunity for Korean makers, since price competition from China is weaker there.
Follow-the-customer export. Recorded brick exports were only USD 28 million in 2022, with Indonesia (USD 11.3 million) the largest destination, while overseas supply to POSCO sites runs through affiliates. Consequence: growth abroad depends on where the Korean steelmakers build, so suppliers should plan to POSCO and Hyundai project calendars.
Lining work is bought as a package. When Hyundai Steel revamped blast furnace No. 1 at Dangjin, it signed a refractory agreement with POSCO Chemical, now POSCO Future M, covering design, supply and dismantling. Consequence: integrated customers buy outcomes, not bricks, and suppliers without design, installation and demolition capability are shut out of the largest events.
Thin margins limit the capital for the new chemistries. Chosun Refractories earns about KRW 2 billion on KRW 532 billion of revenue, and Korea Refractories earned 47% of its 2023 sales from refractories and 53% from construction. Consequence: capital to build alumina, carbon-bonded and flow-control capacity will come from partnerships and customer commitments, not from internally generated cash, and consolidation among independents becomes more likely.
Value Chain: From Mine to Furnace Lining
Raw materials. The Korean industry relies on imported refractory raw materials, and the Dashiqiao link shows how much of that is Chinese. POSCO Future M lists magnesia clinker among its products, and its Chinese affiliate manages quality for outsourced refractories and raw materials. Chosun Refractories’ alumina, fireclay and silicon carbide products and its carbon-bonded lines depend on the same import chain.
Manufacturing. Chosun Refractories, founded in 1947 and based at Gwangyang, makes shaped products (alumina, fireclay, silicon carbide, acid-proof, insulating fire and magnesia-carbon bricks), unshaped products (castables, gunning mixes, plastics and ramming mixes) and flow-control parts (slide-gate plates, shrouds, long stoppers and submerged nozzles). POSCO Future M makes magnesia clinker, magnesia-carbon and magnesia-chrome bricks, castables, ramming mixes, tundish coatings and functional refractories. Korea Refractories, at Dangjin, makes shaped and monolithic products and runs construction and aluminium businesses alongside them. Dongkuk Refractories & Steel at Gimhae is a smaller producer.
Systems and services. Furnace design, construction, maintenance and repair sit with POSCO Future M and with producers such as Korea Refractories that offer installation and upkeep. This layer is where integrated customers award whole-furnace packages, and it is where consolidation logic is strongest.
Customers and end of life. Steel producers buy through annual supply contracts, tenders and package revamp agreements. Power, incinerator, cement, glass and non-ferrous customers buy mostly by project and campaign. End-of-life material is recycled where the economics of raw-material cost allow.
Segment-wise Analysis
By Product Type
Shaped products dominate the traded value and the integrated-mill bill. South Korea imported USD 245 million of refractory bricks in 2022 and USD 204 million in 2023, the fifth-largest importer, with net trade of about −USD 174 million. Domestic strength is in magnesia-carbon, alumina and fireclay bricks. Monolithics (castables, gunning and ramming mixes) are growing with electric-furnace and ladle practice and are a core part of POSCO’s annual ladle contracts. Insulating fire bricks are made by the main producers but are a small part of the domestic offer. Functional flow-control products (slide-gate plates, shrouds, stoppers, submerged nozzles) are the area where trade data show the most import dependence beyond China: refractory ceramics imports were USD 127 million against exports of USD 46.6 million in 2022.
By Refractory Chemistry
Magnesia is the largest chemistry in steelmaking through magnesia-carbon and magnesia-chrome products, and it is the most exposed to imported raw material. Alumina and alumino-silicate products serve ladles, heating furnaces and the new electric and direct-reduction furnaces; imports of bricks with more than 50% alumina or silica were USD 87.3 million in 2023, with net trade of about −USD 72 million. Silicon carbide and carbon-bonded products serve ironmaking and carbon-bearing applications. Chromite remains in POSCO Future M’s magnesia-chrome range, but the industry direction is toward chrome-free formulations.
By Alkalinity
Basic refractories (magnesia, doloma, magnesia-carbon) dominate converters, electric-furnace slag lines and ladles, and they follow integrated-mill operating rates. Neutral products (alumina, chromite, carbon, silicon carbide) benefit most from the move to electric and direct-reduction steelmaking. Acidic products (silica, fireclay, acid-proof bricks) serve heating furnaces, incinerators and cement and glass applications, and they follow slower campaign cycles.
By End-User Industry
Iron and steel is the anchor, with two blast-furnace producers making about 72% of output. Power, incineration, cement and lime, glass, non-ferrous metals and chemicals make up the remainder of the base and are served mainly by Korea Refractories and other producers. The analytical point is channel structure: steel demand is concentrated in two customers, one of which is vertically integrated into refractories, so access to demand depends on contract position and group relationships as much as on product quality.
Iron and Steel: By Furnace and Process Application
Ironmaking is the swing. Blast-furnace relines, such as the Dangjin No. 1 revamp, are large and lumpy, while direct-reduction shafts and melters under HyREX and Hyundai’s Dangjin pilot are a new category. Primary steelmaking is dominated by the basic oxygen furnace, with electric furnaces at about 28% of output and a 2.5-million-tonne hybrid furnace now operating at Gwangyang. Secondary steelmaking, in ladles and ladle furnaces, is the highest-frequency purchase and is where POSCO’s 43-item ladle castable contract sits. Continuous casting and flow control are the highest-value stage and the one where service capability separates suppliers. Reheating furnaces buy mainly on energy efficiency.
Regional Outlook Within South Korea
Korean refractory demand follows the integrated steelworks, and supply sits next to them. Five clusters carry most of the commercial weight.
Gyeongbuk (Pohang). POSCO’s Pohang Steelworks and the headquarters of POSCO Future M. This is the oldest integrated site and a major relining and servicing cluster. Hyundai Steel’s Pohang plant, a bar and shape base, is also here.
Jeonnam (Gwangyang). POSCO’s Gwangyang Steelworks, home of the new 2.5-million-tonne electric furnace, and Chosun Refractories’ plant. It is the highest-value cluster for first-fill and electric-furnace linings.
Chungnam (Dangjin). Hyundai Steel’s Dangjin integrated works, the site of the blast-furnace No. 1 revamp and the direct-reduction pilot, and Korea Refractories’ base. It is the key qualification site for direct-reduction products.
Incheon and Gyeonggi. Hyundai Steel’s main Incheon plant, a bar and shape steel base, and the nearby Pyeongtaek port, a steel shipping point. Demand here follows construction-linked steel.
Gyeongnam (Gimhae). Home to Dongkuk Refractories & Steel, a smaller producer,.
Imports, Exports and Trade Remedies
Imports. South Korea imported USD 245 million of refractory bricks in 2022, the fourth-largest total in the world, led by China (USD 193 million), Japan (USD 13 million), France (USD 8.8 million), the United States (USD 7.6 million) and India (USD 6.2 million). In 2023 imports fell to USD 204 million, about 17% lower, which Market Decipher reads as weak steel demand and destocking rather than import substitution. Refractory ceramics imports were USD 127 million in 2022, the third-largest total in the world, from China (USD 64.6 million), the United States (USD 22.9 million), Japan (USD 18.5 million), Germany (USD 8 million) and Vietnam (USD 2.2 million). Refractory cements imports were USD 48.1 million, with China supplying USD 22.5 million.
Exports. South Korea exported USD 28 million of refractory bricks in 2022, the 21st-largest total. The largest destinations were Indonesia (USD 11.3 million), Brazil (USD 3.1 million), China (USD 2.8 million), the Netherlands (USD 2.3 million) and Japan (USD 2.1 million). Exports of other refractory ceramics were USD 46.6 million, the 12th-largest. The export figures are small because overseas supply to Korean steelmakers is largely handled by affiliates and local plants.
Trade remedies. The evidence reviewed shows no significant Korean trade-remedy measure on refractory imports, so landed cost is driven mainly by Chinese pricing and freight. Market Decipher’s view is that producers should build a standing landed-cost and sourcing model for each import route, including alternatives to Dashiqiao, and review it quarterly.
Competitive Landscape and Share Dynamics
The Korean market has three tiers. The first is the captive supplier: POSCO Future M, a POSCO group company that makes magnesia clinker, shaped and unshaped refractories and functional products, and builds and maintains furnaces. It is the integrated supplier in the market and was chosen by Hyundai Steel for the Dangjin No. 1 revamp. The second is domestic independents: Chosun Refractories, based at Gwangyang, with a broad shaped, unshaped and flow-control range and large annual contracts with POSCO; Korea Refractories at Dangjin, with KRW 193.6 billion of refractory sales in 2023; and smaller producers such as Dongkuk Refractories & Steel. The third is imports and traders, with China supplying about 79% of bricks, followed by Japan, France, the United States and India.
Over the forecast period Market Decipher expects share to move toward producers that can sell design, supply and installation as a package, qualify early on the new electric and direct-reduction furnaces, secure raw material beyond a single Chinese source and localise specialty and flow-control parts. Independents without a service layer or a differentiated product will face margin pressure from both the captive supplier and Chinese imports, and we would expect at least one further consolidation or partnership among Korean independents before 2028.

 Refractories Market Segmentation
Consumption, production, imports and exports for 2026–2036 are segmented as follows.
By Product Type
•    Shaped refractories 
–    Magnesite / magnesia brick
–    Magnesia-carbon brick
–    Dolomite / doloma brick
–    Silica brick
–    Alumina / high-alumina and fireclay brick
–    Zirconia and fused-cast products
–    Chromite / chrome-magnesite brick
–    Silicon carbide and other specialty bricks
•    Unshaped / monolithic refractories 
–    Castables (conventional, low-cement, ultra-low-cement)
–    Ramming and gunning mixes
–    Mortars and coatings
–    Plastic and other monolithics
•    Insulating refractories 
–    Lightweight monolithics and insulating firebrick
–    Ceramic fibre and microporous insulation
•    Functional / flow-control refractories 
–    Slide-gate plates
–    Submerged entry nozzles and ladle shrouds
–    Stopper systems
–    Well blocks and nozzles
By Refractory Chemistry / Mineral
•    Magnesia
•    Alumina / high-alumina and alumino-silicate
•    Silica
•    Doloma
•    Zirconia / zircon
•    Chromite
•    Silicon carbide
•    Carbon / graphite-containing
•    Others
By Alkalinity
•    Basic
•    Acidic
•    Neutral
By End-User Industry
•    Iron and steel
•    Cement and lime
•    Aluminium and other non-ferrous metals
•    Glass
•    Energy, refining and petrochemicals
•    Foundry and ceramics
•    Others
Iron and Steel: By Furnace / Process Application
•    Ironmaking 
–    Blast furnace
–    Direct reduction / DRI shaft and melter
–    Hot-metal transport
•    Primary steelmaking 
–    Basic oxygen furnace
–    Electric arc furnace
–    Induction furnace
•    Secondary steelmaking 
–    Ladle and ladle furnace
–    RH and vacuum degassing
–    Argon-oxygen decarburisation and other refining
•    Continuous casting 
–    Tundish
–    Ladle-to-tundish and tundish-to-mould flow control
–    Submerged entry nozzle, stopper and slide gate
•    Downstream steel processing 
–    Reheating furnace
–    Heat-treatment furnace
–    Other high-temperature processing
By Geography and Trade Route
•    Korean regions: Gyeongbuk (Pohang); Jeonnam (Gwangyang); Chungnam (Dangjin); Incheon and Gyeonggi; Gyeongnam (Gimhae)
•    Imports by origin: China, Japan, France, United States, India and Rest of World
•    Exports by destination: Indonesia, Brazil, China, Netherlands, Japan and Rest of World
Key Refractory Manufacturers and Value Chain Companies Covered
Leading producers and suppliers shaping Korean supply and pricing include, but are not limited to:
•    POSCO Future M  (South Korea; POSCO group)
•    Chosun Refractories  (South Korea; CR Holdings)
•    Korea Refractories  (South Korea)
•    Dongkuk Refractories & Steel  (South Korea)
•    Zhangjiagang Pohang Refractories  (China; POSCO Future M affiliate)
•    Chinese refractory exporters  (China; Dashiqiao region)
•    Japanese, French and US specialty suppliers  (Japan / France / United States)